:root{--primary-color:#2563eb;--primary-dark:#1d4ed8;--bg-color:#f1f5f9;--card-bg:#fff;--text-color:#1e293b;--border-color:#cbd5e1;--input-bg:#fff}

body{background:var(--bg-color);color:var(--text-color);}
.app-container{max-width:900px;margin:0 auto}

.control-panel{background:var(--card-bg);padding:16px 24px;border-radius:8px;box-shadow:0 4px 6px -1px rgba(0,0,0,.1);margin-bottom:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px}
.theme-selector{display:flex;align-items:center;gap:10px}
.theme-label{font-size:14px;font-weight:600;color:#64748b}
.color-btn{width:26px;height:26px;border-radius:50%;border:2px solid #fff;outline:1px solid #cbd5e1;cursor:pointer;transition:transform .2s}
.color-btn:hover{transform:scale(1.15)}
.btn{padding:10px 20px;border:none;border-radius:6px;font-weight:600;font-size:14px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:all .2s}
.btn-download{background:var(--primary-color);color:#fff}
.btn-download:hover{background:var(--primary-dark)}
.btn-download:disabled{opacity:.6;cursor:wait}
.btn-secondary{background:#e2e8f0;color:#334155}
.btn-secondary:hover{background:#cbd5e1}
.btn-danger{background:#fee2e2;color:#dc2626;padding:6px 10px;font-size:13px;border-radius:4px}
.btn-danger:hover{background:#fca5a5}
.quote-paper{background:var(--card-bg);padding:40px;border-radius:8px;box-shadow:0 10px 15px -3px rgba(0,0,0,.1)}
input,textarea,select{width:100%;padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;font-size:14px;color:var(--text-color);outline:none;background:var(--input-bg);transition:border-color .2s}
input:focus,textarea:focus,select:focus{border-color:var(--primary-color)}
.header-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:30px;margin-bottom:30px}
.logo-box{border:2px dashed var(--border-color);border-radius:8px;padding:15px;text-align:center;position:relative;background:#f8fafc;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:130px}
.logo-box input[type=file],.signature-upload-box input[type=file]{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer;padding:0}
.logo-placeholder{color:#64748b;font-size:13px;display:flex;flex-direction:column;align-items:center;gap:6px}
.logo-preview{max-width:100%;max-height:110px;display:none;object-fit:contain}
.meta-box{text-align:right}
.doc-title{font-size:32px;font-weight:800;color:var(--primary-color);text-transform:uppercase;margin-bottom:15px;letter-spacing:1px}
.meta-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px;text-align:left}
.meta-fields label{font-size:12px;font-weight:600;color:#64748b;margin-bottom:4px;display:block}
.address-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:30px}
.address-block h3{font-size:15px;font-weight:700;color:var(--primary-color);margin-bottom:10px;border-bottom:2px solid var(--primary-color);padding-bottom:4px}
.address-block input,.address-block textarea{margin-bottom:10px}
.table-container{width:100%;overflow-x:auto;margin-bottom:15px}
table{width:100%;border-collapse:collapse;min-width:600px}
th{background:var(--primary-color);color:#fff;padding:10px 12px;text-align:left;font-size:13px;font-weight:600;text-transform:uppercase}
td{padding:10px 8px;border-bottom:1px solid #e2e8f0;vertical-align:middle}
.summary-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:30px;margin:25px 0 30px}
.notes-block label{font-size:13px;font-weight:600;color:#64748b;margin-bottom:6px;display:block}
.notes-block textarea{height:100px;resize:vertical}
.totals-block{display:flex;flex-direction:column;gap:10px;background:#f8fafc;padding:15px;border-radius:6px;border:1px solid #e2e8f0}
.totals-row{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:#334155}
.totals-row.grand-total{font-size:18px;font-weight:700;color:var(--primary-color);border-top:2px solid #cbd5e1;padding-top:10px;margin-top:5px}
.totals-row input{width:90px;text-align:right}
.optional-section{border-top:1px solid #e2e8f0;padding-top:20px;margin-top:20px}
.section-header-toggle{display:flex;align-items:center;gap:10px;margin-bottom:15px}
.section-header-toggle h3{font-size:15px;font-weight:700;color:var(--primary-color)}
.toggle-checkbox{width:18px;height:18px;cursor:pointer}
.bank-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;background:#f8fafc;padding:15px;border-radius:6px;border:1px solid #e2e8f0}
.signature-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:end;margin-top:20px}
.signature-upload-box{border:2px dashed var(--border-color);border-radius:6px;padding:12px;text-align:center;position:relative;background:#f8fafc;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:90px}
.signature-preview{max-width:100%;max-height:80px;display:none;object-fit:contain}
.signature-details input{margin-top:6px}
img{max-width:100%}
/* ---------- Tablet (up to 1024px) ---------- */
@media(max-width:1024px){
body{padding:16px 12px}
.app-container{max-width:100%}
.quote-paper{padding:28px}
.header-grid,.address-grid,.summary-grid{gap:20px}
.doc-title{font-size:28px}
}
/* ---------- Mobile / small tablet (up to 768px) ---------- */
@media(max-width:768px){
body{padding:10px 8px}
.quote-paper{padding:18px 14px}
.header-grid,.address-grid,.summary-grid,.bank-grid,.signature-grid{grid-template-columns:1fr;gap:18px}
.meta-box{text-align:left}
.doc-title{font-size:26px;margin-bottom:12px}
.control-panel{flex-direction:column;align-items:stretch;padding:14px}
.theme-selector{justify-content:center;flex-wrap:wrap}
.btn-download{width:100%;padding:12px}
.color-btn{width:32px;height:32px}
input,textarea,select{font-size:16px} /* stops iOS zoom on focus */
.logo-box{min-height:110px}
.signature-grid{align-items:stretch}
.totals-row.grand-total{font-size:17px}
.btn-secondary{width:100%;padding:12px}

/* Items table -> stacked cards */
.table-container{overflow:visible}
table{min-width:0}
table,thead,tbody,tr,td{display:block;width:100%}
thead{display:none}
tbody tr{border:1px solid #e2e8f0;border-radius:8px;padding:10px;margin-bottom:12px;background:#f8fafc;position:relative}
td{border:none;padding:6px 0;display:block}
td[data-label]::before{content:attr(data-label);display:block;font-size:12px;font-weight:600;color:#64748b;margin-bottom:3px}
td.action-cell{text-align:right!important;padding-top:8px}
td.action-cell .btn-danger{padding:8px 14px}
}
/* ---------- Small phones (up to 480px) ---------- */
@media(max-width:480px){
.meta-fields{grid-template-columns:1fr}
.doc-title{font-size:22px}
.theme-label{width:100%;text-align:center}
.totals-row input{width:80px}
.quote-paper{border-radius:6px}
}